Beam position and phase measurement system and method based on full digitalization technology

Abstract

The invention discloses a beam position and phase measurement system and method based on the full digitalization technology. The system comprises a simulation front end part and a digital processing part. In the simulation front end part, the undersampling technology is utilized for carrying out undersampling on input signals from a beam position detector, the sampling rate is accurately adjusted through a phase-locked loop digitally controlled and is made to be four times larger than the digital intermediate frequency signal frequency obtained after the input signals of the beam position detector are undersampled, and a digital orthogonal sequence of the input signals of the beam position detector is directly obtained. In the digital processing part, digital processing is carried out on the digital orthogonal sequence obtained through undersampling of the simulation front end part, the beam position and the phase position of an accelerator are measured, and the phase position is modified on line in real time. Digital processing modules are integrated on a single chip FPGA, and the system structure is greatly simplified. By means of the appropriate sampling rate, the orthogonal sequence of the input signals is directly obtained after ADC sampling, and the signal phase position and amplitude digital processing algorithm is greatly simplified.

Description

technical field [0001] The invention relates to the field of accelerator beam current diagnosis, in particular to an accelerator beam current position and phase measurement system and method based on full digital technology. Background technique [0002] With the gradual deepening of people's understanding of the structure of matter and the study of microscopic particles, natural radioactive particles and cosmic rays cannot meet the experimental requirements, so particle accelerators came into being. There are many types of particle accelerators, and different accelerators have different characteristic parameters such as energy and brightness. In order to achieve the desired characteristics of the beam current, it is necessary to monitor the beam current and perform feedback control. Therefore, the beam current measurement system (also called the beam current diagnosis system) is an indispensable part of the accelerator, and the accelerator experimental devices at home and ...

AI Technical Summary

Problems solved by technology

Compared with the first-generation and second-generation circuit structures, the third-generation fully digital beam measurement method greatly simplifies the complexity of the electronic system, but the algorithm of digital IQ demodulation is too complicated

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